PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-13:42:50
G01     120.4          16.7               10.4 +/-    2.07      24.7 +/-    2.07  0.090 / 0.130
G07     81.2           64.5                9.3 +/-    0.44      10.2 +/-    0.44  0.130 / 0.120
G08     45.3           31.2                7.1 +/-    0.75      12.0 +/-    0.75  0.040 / 0.030
G09     175.8          26.3                7.8 +/-    1.08      14.8 +/-    1.08  0.030 / 0.020
G11     105.9          37.7                9.6 +/-    0.40      14.6 +/-    0.40  0.030 / 0.030
G13     319.4          16.2                6.6 +/-    1.69      15.8 +/-    1.69  0.030 / 0.030
G17     200.5          25.0                7.9 +/-    3.27      15.3 +/-    3.27  0.200 / 0.280
G28     289.7          56.5                8.7 +/-    1.27      10.2 +/-    1.27  0.120 / 0.350
G30     339.8          65.0                9.3 +/-    0.78      10.1 +/-    0.78  0.180 / 0.150